Key Word Studies (Translations-Definitions-Meanings)

Baruch = "blessed"
1) friend, amanuensis, and faithful attendant of Jeremiah
2) a priest, the son of Zabbai who assisted Nehemiah in rebuilding
the walls of Jerusalem
3) a priest, or family of priests, who signed the covenant with Nehemiah
4) son of Col-hozeh, a descendant of Perez or Pharez, the son of Judah

Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

Passive participle from H1288; blessed; Baruk, the name of three Israelites:Baruch.